package chapter5.Example09;

public class Example09 {
    private static final int TIMES = 100000;
    public static void main(String[] args) {
        Example09.testString();
        Example09.testStringBuilder();
        Example09.testStringBuffer();
    }
    public static  void testString(){
        long starTime = System.currentTimeMillis();
        String str ="";
        for(int i = 0;i<TIMES;i++){
            str +="test";
        }
        long endTime = System.currentTimeMillis();
        System.out.println("String test usedtime:"+(endTime-starTime));
    }
    public static  void testStringBuffer(){
        long startTime = System.currentTimeMillis();
        StringBuffer str = new StringBuffer();
        for (int i = 0; i<TIMES;i++){
            str .append("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuffer test usedtime:"+(endTime-startTime));
    }
    public static  void testStringBuilder(){
        long startTime = System.currentTimeMillis();
        StringBuilder str = new StringBuilder();
        for (int i = 0; i<TIMES;i++){
            str .append("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuilder test usedtime:"+(endTime-startTime));
    }
}
